James Morgan "Jimmy" McGill, better known by his professional alias and business moniker Saul Goodman, is an Irish-American criminal defense lawyer and scam artist. During his law career, Jimmy embraced his tendencies as a former scam artist and, after becoming a dedicated and effective criminal lawyer, he began to represent criminals while he himself became increasingly involved in the city's criminal underworld, slowly losing his morality along the way.

Kimberly "Kim" Wexler is an American business lawyer and public defender who worked in Albuquerque, New Mexico, a volunteer at a pro bono legal services firm. She is the wife and confidant of lawyer and Jimmy McGill, whom she met while working at Hamlin, Hamlin & McGill (HHM) as an intern, and had dated for several years before their six-month marriage.

Howard G. Hamlin is an American corporate lawyer from Albuquerque, New Mexico, best known as the owner and CEO of Hamlin, Hamlin & McGill (HHM), a large and respected law firm that originally established by Howard's father George and Chuck McGill, who later added Howard as one of the managing partners.

Eduardo "Lalo" Salamanca is the third Salamanca family member to run their drug operation, following his uncle Hector and cousin Tuco. Unlike most other members of his family, Lalo is often cheerful and charismatic. But like them, he can also be brutally and remorselessly vicious.

One Piece is the name the world gave to all the treasure gained by the Pirate King Gol D. Roger. At least a portion of it once belonged to Joy Boy during the Void Century. The treasure is said to be of unimaginable value, and is currently located on the final island of the Grand Line: Laugh Tale.